# chroot(2)

## NAME

         chroot - change root directory

## SYNOPSIS

         #include <unistd.h>

         int chroot(const char *dirname)

## DESCRIPTION

         Dirname is the address of the pathname of a directory,  terminated  by  a
         null  byte.   Chroot  causes this directory to become the root directory,
         the starting point for path names beginning with ``/''.

         In order for a directory to become the root directory a process must have
         execute (search) access to the directory.

         This call is restricted to the super-user.

## RETURN VALUE

         Upon successful completion, a value of 0 is returned.  Otherwise, a value
         of -1 is returned and errno is set to indicate an error.

## ERRORS

         Chroot will fail and the root directory will be unchanged if one or  more
         of the following are true:

         [ENOTDIR]      A component of the path name is not a directory.

         [ENAMETOOLONG] The path name exceeds PATH_MAX characters.

         [ENOENT]       The named directory does not exist.

         [EACCES]       Search permission is denied for any component of the  path
                        name.

         [ELOOP]        Too many symbolic links were  encountered  in  translating
                        the pathname.  (Minix-vmd)

         [EFAULT]       Path points outside the process's allocated address space.

         [EIO]          An I/O error occurred while reading from or writing to the
                        file system.

## SEE ALSO

         chdir(2).